使用行编辑事件禁用gridview触发器外部的控件（按钮）

Question

我正在尝试禁用控件（按钮），但它在gridview的行编辑事件触发的grideview之外。

Protected Sub gdvCountryList_RowEditing(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles gdvCountryList.RowEditing

    Try

        BtnSaveCountry.Enabled = False

        gdvCountryList.EditIndex = e.NewEditIndex
        SetCountryTable()

    Catch ex As Exception

        Throw ex

    End Try

End Sub